1  // Copyright 2012 Google LLC
  2  //
  3  // Redistribution and use in source and binary forms, with or without
  4  // modification, are permitted provided that the following conditions are
  5  // met:
  6  //
  7  //     * Redistributions of source code must retain the above copyright
  8  // notice, this list of conditions and the following disclaimer.
  9  //     * Redistributions in binary form must reproduce the above
 10  // copyright notice, this list of conditions and the following disclaimer
 11  // in the documentation and/or other materials provided with the
 12  // distribution.
 13  //     * Neither the name of Google LLC nor the names of its
 14  // contributors may be used to endorse or promote products derived from
 15  // this software without specific prior written permission.
 16  //
 17  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 18  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 19  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 20  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 21  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 22  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 23  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 24  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 25  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 26  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 27  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 28  
 29  #ifdef HAVE_CONFIG_H
 30  #include <config.h>  // Must come first
 31  #endif
 32  
 33  #include <stdio.h>
 34  
 35  #include "client/linux/handler/minidump_descriptor.h"
 36  
 37  #include "common/linux/guid_creator.h"
 38  
 39  namespace google_breakpad {
 40  
 41  //static
 42  const MinidumpDescriptor::MicrodumpOnConsole
 43      MinidumpDescriptor::kMicrodumpOnConsole = {};
 44  
 45  MinidumpDescriptor::MinidumpDescriptor(const MinidumpDescriptor& descriptor)
 46      : mode_(descriptor.mode_),
 47        fd_(descriptor.fd_),
 48        directory_(descriptor.directory_),
 49        c_path_(NULL),
 50        size_limit_(descriptor.size_limit_),
 51        address_within_principal_mapping_(
 52            descriptor.address_within_principal_mapping_),
 53        skip_dump_if_principal_mapping_not_referenced_(
 54            descriptor.skip_dump_if_principal_mapping_not_referenced_),
 55        sanitize_stacks_(descriptor.sanitize_stacks_),
 56        microdump_extra_info_(descriptor.microdump_extra_info_) {
 57    // The copy constructor is not allowed to be called on a MinidumpDescriptor
 58    // with a valid path_, as getting its c_path_ would require the heap which
 59    // can cause problems in compromised environments.
 60    assert(descriptor.path_.empty());
 61  }
 62  
 63  MinidumpDescriptor& MinidumpDescriptor::operator=(
 64      const MinidumpDescriptor& descriptor) {
 65    assert(descriptor.path_.empty());
 66  
 67    mode_ = descriptor.mode_;
 68    fd_ = descriptor.fd_;
 69    directory_ = descriptor.directory_;
 70    path_.clear();
 71    if (c_path_) {
 72      // This descriptor already had a path set, so generate a new one.
 73      c_path_ = NULL;
 74      UpdatePath();
 75    }
 76    size_limit_ = descriptor.size_limit_;
 77    address_within_principal_mapping_ =
 78        descriptor.address_within_principal_mapping_;
 79    skip_dump_if_principal_mapping_not_referenced_ =
 80        descriptor.skip_dump_if_principal_mapping_not_referenced_;
 81    sanitize_stacks_ = descriptor.sanitize_stacks_;
 82    microdump_extra_info_ = descriptor.microdump_extra_info_;
 83    return *this;
 84  }
 85  
 86  void MinidumpDescriptor::UpdatePath() {
 87    assert(mode_ == kWriteMinidumpToFile && !directory_.empty());
 88  
 89    GUID guid;
 90    char guid_str[kGUIDStringLength + 1];
 91    if (!CreateGUID(&guid) || !GUIDToString(&guid, guid_str, sizeof(guid_str))) {
 92      assert(false);
 93    }
 94  
 95    path_.clear();
 96    path_ = directory_ + "/" + guid_str + ".dmp";
 97    c_path_ = path_.c_str();
 98  }
 99  
100  }  // namespace google_breakpad